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just olya [345]
3 years ago
7

The sum of 45% of a number and 55% of the same number is 200. what is the number?

Mathematics
1 answer:
Ymorist [56]3 years ago
8 0

.45x+.55x=200
Combine like terms
1x=200
So x is 100

Or you can do 45%+55%=100%
And 100% of 200 is 200
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How many ways can an employer send 3 employees to a job fair if she has 11 employees?
algol13

We have to find the number of ways an employer send 3 employees to a job fair if she has 11 employees.

This is the problem from combination.

The formula for combination is given by

^nC_r= \frac{n!}{r!(n-r)!}

Here, n= 11, r= 3

Therefore, total number of ways is given by

^{11}C_3= \frac{11!}{3!(11-3)!}\\
\\
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\\
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\\
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\\
=165

A is the correct option.


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Step-by-step explanation:


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